Electrical controlling system for rolling or sliding shutters, elevators, &amp;c.



I L. G. WILSON. ELEGTRIGAL CONTROLLING SYSTEM FOR. ROLLING 0R SLIDINGSHUTTERS, ELEVATORS; 6m.

APPLICATION FILED HAY 23; 1908.

WIT/(8858.- v lwmron @W I Lisrffi'Gf'gmLsa/v MW I Q' H -M ATTORNEYSPatented Nov. 9,1909 f ltl ' only those parts which require to bechanged -.To all whom it may concern:

electrical circuits, switches. and power transmitting mechanisms suchthat. the starting driven, as to its motive power, by a shunt switchpoints 2 tJ'NiTED \STAIELSW PAIENT 'OFFlCE.

L ESTER G. WILSON. OF LARCHMONT, NEW YORK.

- ELECTRICAL CONTROLLING SYSTEM FOR ROLLING OR SLIDING SHUTTER/S,

ELEVATORS, &c.

Be it known that I, LESTER G. \VILSON, a resident of liarclnnont,\Vestchester county, State of New York, have invented certain new anduseful Improvements in Electrical Controlling Systems for Rolling orSliding Shutters, l lleyators, and Similarly-h'loving Devices. oi whichthe following; is a specification. 7

My invention relates more particularly to that class of controls inwhich a shutter, elevator,'or other device is required to operatebetween a certain two fixed limits and has tot-its object to provide anarrangement of of the moving device in either'one of its directions'ofmovement may be positively and simplycontrolled at any (.lesired'distance from the moving device itself and whereby such moving device.ollceStlttIlGtl in its movement, will continue soto more until itreaches its predetermined limit. where it will be automatically stopped.

The diagrammatic t lrawing, Figure 1, shows my invention as appliedtothe operation of a vertically moving metallic shutter wound electricmotor.- A similar diagrammatic view. on a smaller scale, but showingwhen a series wound motor is substitutedfor a shunt wound motor. isgiven in Fig. 2. Fig. ii is a perspective view of themain controlswitch'shmvn diagrannnatically in Fig. 1. I

The operation of the shutter is controlled by the double pole, doublethrow. knife switch, 1. .which has the usual .terminal points 3,4. 5, (3and 7, together with two extra tern' inal points, 8 and S). lyingbetween and in line with 3 and 5. and Eland -7-re spectively; electricalconductors or mains, 36 and 37. protected by the usual fuses 38, 38,lead from a-suitable source of electrical supply to points 2 and 3 ofthis switch, From switchpoints, and 7, electrical conductors.-2S and 29.lead to the. armature circuit, 2?, ol' a suitable shunt wound electricmotor of which the field circuit 26, is joined by electrical conductors,and 31, to the and 9. Points 8 and 9, of themain switch are joinedby ashort conductor, 39. From switch points, 4, and con- Specification ofLettcrsPatent. lutv tvml 30 ,190 Application filed May 23, 1908. SerialNo. 434,520.

lower limit) to be controlled and to is a bottom it or strengthening barrunning along and attached to the lower edge of the shutter. -Below thisbottom bar, and attached to it, is a short vertical lug, 16, whichmoves. when the shutter moves, in aline prolonginp the short bar. 1 Indescending, therefore, when the shutter reaches its lower limit, thelug, 16, will press upon thebar, l3. and thereby open the switch 10.\Vhen the shutter rises switch 10 will be immediately closed again bythe pressure of a spring, 18, attached to box at 19, and act- 'ingup\\"ardly'on a pin, 17. fixed to the bar 13.; r

The broken ofl' loner-right hand corner. of the slmtteiz'with the latterat its upper limit'or fully open, is represented by 22:),

with 22 as the bottom or strengthening ba-r. Attached to 2 2 is 'achain, 21, (shown broken in the figure) hangmg freely and passingthrongh-a.hole, 20. in the handle of a single pole. single throw,knife switch.11, inclosed in a suitable box. 40. Upon the chain and below the hole.20, is a ring, 23-.

.01 diameter too greatto pass through the hole. As the shutter rises,therefore. carrying; the chain with 1t. 1t will. when it reaches itsupper ln'n1t,.bring ring 2} against the underside of the handle ofswitch.11, and

open the switch. 'hen the shutter descends,

the chain, 21, and ring, 21, will drop and allow the weight, 25, hangingfrom switch,

11. to close the same; i v

From the terminals of switch 11, two'condnctors, 3i and 35, go toeondtwtor, 2S, and switch point, 6, respectively. I

The motor armature, 27, should beconnected mechanically with the shuttert-obe, controlled by any suitable intermediate train of gears or beltssuch that the direction of the shutter will reverse witha reversal ofdirection of the armature rotation.

Suppose, now, the shutter, to be i i its top or open position as shownby 23'; switch 11 will then be open. Switch 10, however, will be closedsince the curtain 14, (which is merely the left hand end of 28) will beup instead of dow n; suppose,also, that-main switch 1, is open, To'lowerthe shutter, switch 1 must be thrown to the left; the switch blade, 42,will then join points 2 and while switch blade ll will join points 5,'8, and f l, and, as may be readily traced out, a

circuit'will be completed from one main conductor, 36, e. 9., tl'1roughswitch 10, motor armature, 27, and back to the other main conductor, 37the field circuit, 26, of the motor will, as may be noted, he closed byway of 2, 30, 31, 39, 8, and 3 back to 37, thus upon the short bar, 13,as previously explained. By. now opening the main switch, 1, the currentthrough the field circuit 26, also broken so that current is completelyshut old from the motor. The shutter be ing now closed it may be raised,or opened, by throwing main switch, 1, to the right; switch blade 42will then join 2 and 6, while switch blade 41 will join points 3, 9, andT, and if the circuit be now traced out itwill be found to be againcomplete from main conductor 36, through switch 11', '(which was closedby the weight, 25, when the shutter was lowered) and through motorarmature, 27, back to main conductor 37 the field circuit 26, of themotor will, as before,

i be in parallel with that of the armature, 27.

But the current through the armature will now be in the reversedirection to that which obtained before when the shutter was beinglowered, while the current through the field circuit will be in the samedirection and, this being the condition for reversal oi, rotativedirection of the motor armature. the

shutter will now ascend instead of descend and will continue so to dountil switch 11 is opened by the upward pull of chain, 21, ring 2%, thusagain, breaking the ar mature circuit and stopping the motor. Openingswitch 1 fully will again'open the field circuit.

It should be'obscrved that in operating main switch 1, by theconstruction of the switch, the armature circuit is always closed afterthe shunt or field circuit is closed and opened before theshunt or fieldcircuit'is opened. This is a necessary condition in shunt wound motors,as is well known, if

one of the field leads and a main, respectively which, for a'seriesmotor, are removed from main switch; 1, and connected together to formthe conductor 43 of Fig. 3.

lVhile I prefer to use my control for op erating between two fixedlimits I am'n'ot necessarily confined to such limits but may stop theshutter or other device at any point between such limits by merelyopening the main switch, 1, and may. eitherc'ontinue the movement laterby again closing the switch in the same direction or may reverse the.movement by 7 closing the switch in the opposite'direction;

Having now fully described my invention I claim I in a systemfonoperating and controlling a rollingmetallic shutter adapted to beraised -or lowered by an electric-motor, in combination, a double poledouble throw knife switch adapted to closeeither of two circuits eachincluding the motor said switch being provided with extracontacts one ofwhich is adapted to engage oneof said switch blades when said switch isclosed in either direction and said cxtra' contacts being joined to oneend ot'th'e field circuit of said motor a normally closed single throwsingle pole knife switch in one of said imlep'endent circuits the handleotsaid switch being, joined by a link to a bar adapted to be struck andmoved vertically by the bottom barof the shutter when fully closedthereby single throw single pole knife switch in the ofsaid switchhaving a weight attached thereto adapted tohold SHHl SWliCll closed.

said handle being further attached toachain a remote end-,ot which isattached above the switch to the bottom bar of the shutter so that asthe shutter reaches the limit ofiits upward movement said switch opened;substantially as and for the purpose described.

In testimony whereof I have hereunto set my hand l d scalin the presenceof two' subscribing witnesses, this 20th day of May,

, LESTER G. WILSON. [1,. s.'{ -WVitnesses: 1

,HOWARD M. Born,

Emma Sinmn'oUNo.

